#include "itkImageFileWriter.h"

#include "itkSmoothingRecursiveGaussianImageFilter.h"

#include "itkPluginUtilities.h"

#include "GaussianBlurImageFilterCLP.h"

// Use an anonymous namespace to keep class types and function names
// from colliding when module is used as shared object module.  Every
// thing should be in an anonymous namespace except for the module
// entry point, e.g. main()
//
namespace
{

template <class T>
int DoIt(int argc, char* argv[], T)
{
  PARSE_ARGS;

  typedef T InputPixelType;
  typedef T OutputPixelType;

  typedef itk::Image<InputPixelType, 3> InputImageType;
  typedef itk::Image<OutputPixelType, 3> OutputImageType;

  typedef itk::ImageFileReader<InputImageType> ReaderType;
  typedef itk::ImageFileWriter<OutputImageType> WriterType;

  typedef itk::SmoothingRecursiveGaussianImageFilter<InputImageType, OutputImageType> FilterType;

  typename ReaderType::Pointer reader = ReaderType::New();

  reader->SetFileName(inputVolume.c_str());

  typename FilterType::Pointer filter = FilterType::New();
  filter->SetInput(reader->GetOutput());
  filter->SetSigma(sigma);

  typename WriterType::Pointer writer = WriterType::New();
  writer->SetFileName(outputVolume.c_str());
  writer->SetInput(filter->GetOutput());
  writer->Update();

  return EXIT_SUCCESS;
}

} // end of anonymous namespace

int main(int argc, char* argv[])
{
  PARSE_ARGS;

  itk::IOPixelEnum pixelType;
  itk::IOComponentEnum componentType;

  try
  {
    itk::GetImageType(inputVolume, pixelType, componentType);

    // This filter handles all types on input, but only produces
    // signed types
    switch (componentType)
    {
      case itk::IOComponentEnum::UCHAR: return DoIt(argc, argv, static_cast<unsigned char>(0)); break;
      case itk::IOComponentEnum::CHAR: return DoIt(argc, argv, static_cast<char>(0)); break;
      case itk::IOComponentEnum::USHORT: return DoIt(argc, argv, static_cast<unsigned short>(0)); break;
      case itk::IOComponentEnum::SHORT: return DoIt(argc, argv, static_cast<short>(0)); break;
      case itk::IOComponentEnum::UINT: return DoIt(argc, argv, static_cast<unsigned int>(0)); break;
      case itk::IOComponentEnum::INT: return DoIt(argc, argv, static_cast<int>(0)); break;
      case itk::IOComponentEnum::ULONG: return DoIt(argc, argv, static_cast<unsigned long>(0)); break;
      case itk::IOComponentEnum::LONG: return DoIt(argc, argv, static_cast<long>(0)); break;
      case itk::IOComponentEnum::FLOAT: return DoIt(argc, argv, static_cast<float>(0)); break;
      case itk::IOComponentEnum::DOUBLE: return DoIt(argc, argv, static_cast<double>(0)); break;
      case itk::IOComponentEnum::UNKNOWNCOMPONENTTYPE:
      default: std::cout << "unknown component type" << std::endl; break;
    }
  }

  catch (itk::ExceptionObject& excep)
  {
    std::cerr << argv[0] << ": exception caught !" << std::endl;
    std::cerr << excep << std::endl;
    return EXIT_FAILURE;
  }
  return EXIT_SUCCESS;
}
